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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-10 14:47:34 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-10 20:54:32 +0000 |
| commit | f51455d442c0fa97e4600960f19bf23b66f0b386 (patch) | |
| tree | bbe0a09197a72cec73e5e8ce867067f693a8f6dd /drivers/gpu/drm/i915/i915_gem_gtt.h | |
| parent | drm/i915: Rename i915_gem_engine_cleanup() to engine_set_wedged() (diff) | |
| download | linux-dev-f51455d442c0fa97e4600960f19bf23b66f0b386.tar.xz linux-dev-f51455d442c0fa97e4600960f19bf23b66f0b386.zip | |
drm/i915: Replace 4096 with PAGE_SIZE or I915_GTT_PAGE_SIZE
Start converting over from the byte count to its semantic macro, either
we want to allocate the size of a physical page in main memory or we
want the size of a virtual page in the GTT. 4096 could mean either, but
PAGE_SIZE and I915_GTT_PAGE_SIZE are explicit and should help improve
code comprehension and future changes. In the future, we may want to use
variable GTT page sizes and so have the challenge of knowing which
hardcoded values were used to represent a physical page vs the virtual
page.
v2: Look for a few more 4096s to convert, discover IS_ALIGNED().
v3: 4096ul paranoia, make fence alignment a distinct value of 4096, keep
bdw stolen w/a as 4096 until we know better.
v4: Add asserts that i915_vma_insert() start/end are aligned to GTT page
sizes.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170110144734.26052-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index 9e91d7e6149c..34a4fd560fa2 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -40,6 +40,9 @@ #include "i915_gem_timeline.h" #include "i915_gem_request.h" +#define I915_GTT_PAGE_SIZE 4096UL +#define I915_GTT_MIN_ALIGNMENT I915_GTT_PAGE_SIZE + #define I915_FENCE_REG_NONE -1 #define I915_MAX_NUM_FENCES 32 /* 32 fences + sign bit for FENCE_REG_NONE */ @@ -543,6 +546,6 @@ void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj, #define PIN_HIGH BIT(9) #define PIN_OFFSET_BIAS BIT(10) #define PIN_OFFSET_FIXED BIT(11) -#define PIN_OFFSET_MASK (~4095) +#define PIN_OFFSET_MASK (-I915_GTT_PAGE_SIZE) #endif |